Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
tairg
←
Middle Irish
taircid
(inherited)
←
Old Irish
do·fairget
(inherited)
←
Old Irish
to-
(affix)
←
Old Irish
ro-
(affix)
←
Old Irish
ad-
(affix)
←
Old Irish
guidid
(affix)